Although rare, things related to or not related to the application can cause an upgrade to fail. Having a database backup ensures a quick way back to a stable environment should you need to perform the upgrade a second time.
Knowing this means that backing up your database before upgrading is incredibly important, don’t assume things can’t go wrong.
For the majority of customers, they will be running in a hosting environment that offers a control panel, and within that control panel, a tool called phpMyAdmin.
phpMyAdmin is a database management tool for MySQL (the database type MOHOBOOK uses), but in addition to powerful management features, phpMyAdmin also offers the ability to create backups, or more accurately, ability to Export an entire database.
To learn how to do this, we are linking you to a reliable third-party source: